WO2011096603A1 - Method for removing chlorides by washing municipal solid waste incineration bottom ash and carbonation reaction - Google Patents
Method for removing chlorides by washing municipal solid waste incineration bottom ash and carbonation reaction Download PDFInfo
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- WO2011096603A1 WO2011096603A1 PCT/KR2010/000736 KR2010000736W WO2011096603A1 WO 2011096603 A1 WO2011096603 A1 WO 2011096603A1 KR 2010000736 W KR2010000736 W KR 2010000736W WO 2011096603 A1 WO2011096603 A1 WO 2011096603A1
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- bottom ash
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/80—Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
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- the present invention relates to a method for removing the chloride of the municipal waste incineration bottom ash, more specifically, the municipal waste incineration bottom ash comprising the step of washing the soluble chloride contained in the bottom ash and carbonizing the soluble chloride (Friedel chloride) It relates to a method for removing chlorides.
- Chloride in the bottom ash is present as soluble and insoluble chlorides.
- the Friedel salt an insoluble compound, was first mentioned by Friedel, who studied the reactivity of lime containing aluminum chloride in 1897 as a generic name for 3CaOAl 2 0 3 CaCl 2 10H 2 O compounds. To date, many researchers have studied Friedel salts and found that they do not readily dissolve in water unless they contain carbonate (CO 3 2- ) or the water temperature does not rise above 90 ° C. In Japan, a study was carried out to remove chlorides contained in domestic waste incinerators by washing with water. According to the results of the study, when the various types of fly ash were washed with water, the samples showing very low desalination rate were found. This was called the influence of Friedel salt.
- the present inventors have made diligent efforts to develop a method for effectively removing poorly soluble chloride from the municipal waste incineration flooring, and when injecting carbon dioxide into the incineration flooring by removing the soluble chloride by washing the municipal waste incineration flooring with water, It was confirmed that the chloride contained can be effectively removed, and the present invention has been completed.
- An object of the present invention is to provide a method for effectively removing the chloride contained in the municipal waste incineration bottom ash, which was difficult to completely remove in the prior art.
- the present invention (a) a water treatment step of removing the soluble chloride by stirring the incineration bottom ash of domestic waste with distilled water of pH 5-7: and (b) the CO 2 gas It provides a method of removing the chloride of the municipal waste incineration bottom ash comprising the step of carbonating the poorly soluble chloride by injection.
- 1 is a process chart showing a chloride removal process of the municipal waste incineration bottom ash according to the present invention.
- Figure 2 is a graph showing the removal rate of Cl ions after water treatment of the municipal waste incineration bottom ash according to the present invention.
- Figure 3 shows the X-ray diffraction pattern of the flooring material before and after the washing treatment of the municipal waste incineration flooring.
- Figure 4 shows the X-ray diffraction pattern of the flooring material before and after washing and carbonation treatment of the municipal waste incineration flooring.
- the present invention (a) water washing step of removing the soluble chloride by stirring the incineration bottom ash of domestic waste with water of pH 5-7; And (b) injecting CO 2 gas into the flushed bottom ash to carbonize the poorly soluble chloride to remove chlorides from the municipal waste incineration bottom ash.
- the solid-liquid ratio (liquid / solid) of the incineration bottom ash of household waste to be stirred in the step (a) may be characterized in that 2 to 10, the solid solution of the washed flooring of the step (b) The ratio (liquid / solid) may be 5 to 10.
- the domestic waste incineration bottom ash of step (a) when the municipal waste incineration bottom ash of step (a) is heated, it is characterized in that it is dried until the moisture content decrease amount is less than 0.1%, the domestic waste incineration bottom ash of step (a) is It may be characterized in that the metal is removed.
- the metal contained in the incineration flooring can be removed using a magnetic separator or the like.
- the water used in the water washing step is preferably pH 5-7, more preferably using distilled water of pH 5.8 ⁇ 6.3.
- the washing and carbonation treatment were selected as a method for removing chlorides from municipal waste incineration bottom ash.
- the dry incineration bottom ash is separated by particle size, and then washed with water to remove soluble chloride. It is characterized by passing through a carbonation process to remove.
- the present invention is to heat the municipal waste incineration bottom ash having a water content of about 30-50% to a temperature of 100 °C to dry until the decrease in water content is less than 0.1% and using a magnetic separator, such as iron metal in the floor Removing water and separating the particle size classified by particle size using a standard body, and distilled water having a pH of 5.8 to 6.3 in a Erlenmeyer flask was added to the solid-liquid ratio (L / S) of 5 and mixed with a flooring material to be measured and stirred. It is composed of a carbonation step by artificially injecting CO 2 to remove Friedel salt, a poorly soluble chloride.
- the municipal waste incineration bottom ash having a water content of about 30-50% was placed in an oven and heated to a temperature of 100 ° C., and dried (about 1 day) until the decrease in water content was less than 0.1%.
- the dried flooring material was removed by using a magnetic separator to remove the ferrous metals contained in the flooring material.
- a washing process was performed.
- 200 mL of distilled water having a pH of 5.8-6.3 was placed in a 500 mL Erlenmeyer flask, and the solid solution ratio (L / S) was set at 5 and mixed with the bottom ash (40 g) to be measured for 20 hours at 200 rpm.
- the concentration of K, Na, Ca and Cl for the leaching solution separated from the sample was measured using an X-ray diffractometer.
- Figure 3 shows the results of XRD analysis before and after washing the flooring material having a particle size of 0.15mm, the soluble compounds KCl, NaCl and Friedel salts of poorly soluble chloride (3CaOAl 2 O.CaCl.10H 2) O) peak appeared.
- the XRD of the washed flooring showed no peaks of KCl and NaCl but remained of Friedel salts.
- the soluble salts are removed, and the liquid-liquid ratio (L / S) of water and incinerated bottoms is set to 10, and CO 2 is artificially blown for 30 minutes to perform carbonation, followed by X-ray diffraction.
- the concentration of chloride was measured using the device.
- the present invention it is possible to effectively remove the chloride of the municipal waste incineration flooring, it is possible to solve the problems caused by the large amount of chloride contained in the flooring when recycling the municipal waste incineration flooring to landfill or road paving.
Abstract
The present invention relates to a method for removing chlorides of municipal solid waste incineration bottom ash, and more particularly to a method for removing chlorides of municipal solid waste incineration bottom ash, including washing soluble chlorides included in bottom ash, and carbonating Friedel's salt. According to the present invention, chlorides of municipal solid waste incineration bottom ash can be effectively removed, thereby resolving problems caused by a large quantity of chlorides included in bottom ash when municipal solid waste incineration bottom ash is recycled as reclamation material or as road pavement material.
Description
본 발명은 생활 폐기물 소각 바닥재의 염화물을 제거하는 방법에 관한 것으로, 더욱 자세하게는 바닥재 내에 포함된 가용성 염화물을 수세처리하는 단계 및 난용성(Friedel) 염화물을 탄산화처리하는 단계를 포함하는 생활 폐기물 소각 바닥재의 염화물을 제거하는 방법에 관한 것이다. The present invention relates to a method for removing the chloride of the municipal waste incineration bottom ash, more specifically, the municipal waste incineration bottom ash comprising the step of washing the soluble chloride contained in the bottom ash and carbonizing the soluble chloride (Friedel chloride) It relates to a method for removing chlorides.
생활 폐기물 소각재는 90%의 바닥재와 10%의 비산재로 구성되어 있으며 비산재의 경우 지정 폐기물이기 때문에 매립에 의존하고 있지만 바닥재의 경우 일반 폐기물 임에도 불구하고 전량 매립시키고 있다. 외국의 경우 대부분 바닥재를 파/분쇄 공정, 자력선별 공정, 수세처리 공정, 탄산화 공정 등을 통해 안정화 시키며 안정화 처리된 바닥재를 보조 기층재, 제방, 충진제, 아스팔트 콘크리트, 콘크리트 블록 등 다양한 제품들로 재활용되고 있다. 그러나 안정성이 요구되는 바닥재의 올바른 전처리 기술이 한국에서는 아직까지 발달되어 있지 못한 실정이다. 특히 국내의 경우 외국에 비해 바닥재의 염화물 함유량이 매우 높기 때문에 효율적인 염화물 제거 공정이 더욱 절실히 필요하다. Domestic waste incinerators are composed of 90% floor ash and 10% fly ash and fly ash is designated waste because it is a designated waste, but floor ash is entirely landfilled despite being a general waste. In foreign countries, most flooring materials are stabilized through a crushing / crushing process, magnetic screening process, flushing process, and carbonation process. It is becoming. However, the correct pretreatment technology for flooring material, which requires stability, has not yet been developed in Korea. In particular, since the chloride content of the flooring material is very high in Korea compared to foreign countries, an efficient chloride removal process is more urgently needed.
바닥재에 함유된 염화물은 가용성 염화물과 불용성 염화물로 존재하고 있다. 불용성 화합물인 Friedel 염은 3CaO·Al2O3·CaCl2·10H2O 화합물의 일반적인 이름으로써 1897년 염화알루미늄을 함유하는 석회의 반응성에 대해 연구한 Friedel에 의해 처음 언급되었다. 지금까지 많은 연구자들이 Friedel 염에 대해 연구하였으며 그 결과 탄산이온(CO3
2-)이 함유되어 있지 않거나 수온이 90℃이상으로 되지 않으면 물속에서 쉽게 용해되지 않는다는 사실이 밝혀졌다. 일본의 경우 생활폐기물 소각장에서 발생하는 비산재를 대상으로 하여 함유된 염화물을 수세 처리를 통하여 제거하는 연구를 실시하였으며 그 연구결과에 따르면 여러 종류의 비산재를 수세 처리 하였을 경우 탈염율이 매우 낮게 나타나는 시료가 있었으며 이는 Friedel 염의 영향이라 하였다.Chloride in the bottom ash is present as soluble and insoluble chlorides. The Friedel salt, an insoluble compound, was first mentioned by Friedel, who studied the reactivity of lime containing aluminum chloride in 1897 as a generic name for 3CaOAl 2 0 3 CaCl 2 10H 2 O compounds. To date, many researchers have studied Friedel salts and found that they do not readily dissolve in water unless they contain carbonate (CO 3 2- ) or the water temperature does not rise above 90 ° C. In Japan, a study was carried out to remove chlorides contained in domestic waste incinerators by washing with water. According to the results of the study, when the various types of fly ash were washed with water, the samples showing very low desalination rate were found. This was called the influence of Friedel salt.
이에, 본 발명자들은 생활폐기물 소각 바닥재에서 난용성 염화물을 효과적으로 제거하는 방법을 개발하고자 예의 노력한 결과, 생활폐기물 소각 바닥재를 수세처리하여 가용성 염화물을 제거한 소각 바닥재에 탄산가스를 주입하는 경우, 소각 바닥재에 포함된 염화물을 효과적으로 제거할 수 있다는 것을 확인하고, 본 발명을 완성하게 되었다. Accordingly, the present inventors have made diligent efforts to develop a method for effectively removing poorly soluble chloride from the municipal waste incineration flooring, and when injecting carbon dioxide into the incineration flooring by removing the soluble chloride by washing the municipal waste incineration flooring with water, It was confirmed that the chloride contained can be effectively removed, and the present invention has been completed.
발명의 요약Summary of the Invention
본 발명의 목적은 종래기술로는 완전히 제거하기 어려웠던 생활폐기물 소각 바닥재에 포함된 염화물을 효과적으로 제거하는 방법을 제공하는데 있다. An object of the present invention is to provide a method for effectively removing the chloride contained in the municipal waste incineration bottom ash, which was difficult to completely remove in the prior art.
상기 목적을 달성하기 위하여, 본 발명은 (a) 생활폐기물의 소각바닥재를 pH 5~7의 증류수와 섞어 교반시켜 가용성 염화물을 제거하는 수세처리단계: 및 (b) 수세처리된 바닥재에 CO2 가스를 주입하여 난용성 염화물을 탄산화시키는 단계를 포함하는 생활폐기물 소각 바닥재의 염화물을 제거하는 방법을 제공한다. In order to achieve the above object, the present invention (a) a water treatment step of removing the soluble chloride by stirring the incineration bottom ash of domestic waste with distilled water of pH 5-7: and (b) the CO 2 gas It provides a method of removing the chloride of the municipal waste incineration bottom ash comprising the step of carbonating the poorly soluble chloride by injection.
도 1은 본 발명에 따른 생활폐기물 소각 바닥재의 염화물 제거공정을 나타낸 공정도이다. 1 is a process chart showing a chloride removal process of the municipal waste incineration bottom ash according to the present invention.
도 2는 본 발명에 따른 생활폐기물 소각 바닥재의 수세처리 이후, Cl 이온의 제거율을 나타낸 그래프이다. Figure 2 is a graph showing the removal rate of Cl ions after water treatment of the municipal waste incineration bottom ash according to the present invention.
도 3은 생활폐기물 소각 바닥재의 수세처리 전, 후의 바닥재의 X선 회절 패턴을 나타낸 것이다. Figure 3 shows the X-ray diffraction pattern of the flooring material before and after the washing treatment of the municipal waste incineration flooring.
도 4는 생활폐기물 소각 바닥재의 수세처리 및 탄산화 처리 전, 후의 바닥재의 X선 회절패턴을 나타낸 것이다.Figure 4 shows the X-ray diffraction pattern of the flooring material before and after washing and carbonation treatment of the municipal waste incineration flooring.
발명의 상세한 설명 및 구체적인 구현예Detailed Description of the Invention and Specific Embodiments
본 발명의 다른 특징 및 구현예는 다음의 상세한 설명 및 첨부된 특허청구범위로부터 명백해 질 것이다.Other features and embodiments of the invention will be apparent from the following detailed description and the appended claims.
본 발명은 (a) 생활폐기물의 소각바닥재를 pH 5~7의 물과 섞어 교반시켜 가용성 염화물을 제거하는 수세처리단계; 및 (b) 수세처리 된 바닥재에 CO2 가스를 주입하여 난용성 염화물을 탄산화시키는 단계를 포함하는 생활폐기물 소각 바닥재의 염화물을 제거하는 방법에 관한 것이다. The present invention (a) water washing step of removing the soluble chloride by stirring the incineration bottom ash of domestic waste with water of pH 5-7; And (b) injecting CO 2 gas into the flushed bottom ash to carbonize the poorly soluble chloride to remove chlorides from the municipal waste incineration bottom ash.
본 발명에 있어서, 상기 (a) 단계에서 교반시키는 생활폐기물의 소각바닥재의 고액비율(액체/고체)은 2~10인 것을 특징으로 할 수 있고, 상기 (b) 단계의 수세처리 된 바닥재의 고액비율(액체/고체)은 5~10인 것을 특징으로 할 수 있다. In the present invention, the solid-liquid ratio (liquid / solid) of the incineration bottom ash of household waste to be stirred in the step (a) may be characterized in that 2 to 10, the solid solution of the washed flooring of the step (b) The ratio (liquid / solid) may be 5 to 10.
본 발명에 있어서, 상기 (a) 단계의 생활폐기물 소각 바닥재는 가열하였을 때, 함수율 감소량이 0.1% 미만이 될 때까지 건조된 것임을 특징으로 할 수 있고, 상기 (a) 단계의 생활폐기물 소각 바닥재는 금속이 제거된 것임을 특징으로 할 수 있다. In the present invention, when the municipal waste incineration bottom ash of step (a) is heated, it is characterized in that it is dried until the moisture content decrease amount is less than 0.1%, the domestic waste incineration bottom ash of step (a) is It may be characterized in that the metal is removed.
본 발명에 있어서, 소각 바닥재에 포함된 금속은 자력선별기 등을 이용하여 제거할 수 있다. In the present invention, the metal contained in the incineration flooring can be removed using a magnetic separator or the like.
본 발명에서, 수세처리단계에 사용되는 물은 pH 5~7인 것이 바람직하고, 더욱 바람직하게는 pH 5.8~6.3의 증류수를 사용하는 것이 바람직하다. In the present invention, the water used in the water washing step is preferably pH 5-7, more preferably using distilled water of pH 5.8 ~ 6.3.
본 발명에서는 생활폐기물 소각 바닥재의 염화물 제거를 위한 방법으로 수세(Washing)와 탄산화(Carbonation) 처리를 선택하였다. In the present invention, the washing and carbonation treatment were selected as a method for removing chlorides from municipal waste incineration bottom ash.
본 발명은 생활폐기물 소각 바닥재에 함유되어 있는 염화물을 효과적으로 제공하기 위하여, 도 1에 나타난 바와 같이, 건조 소각바닥재를 입도별로 분리한 다음, 가용성 염화물을 제거하는 수세공정을 거친 후, 난용성 염화물을 제거하는 탄산화 공정을 거치는 것을 특징으로 한다. In order to effectively provide the chloride contained in the municipal waste incineration bottom ash, as shown in FIG. 1, the dry incineration bottom ash is separated by particle size, and then washed with water to remove soluble chloride. It is characterized by passing through a carbonation process to remove.
본 발명은 일 양태에서, 함수율이 약 30-50%인 생활폐기물 소각 바닥재를 100℃의 온도로 가열하여 함수율의 감소량이 0.1%미만이 될 때까지 건조하고 자력선별기를 이용하여 바닥재 내의 철 금속 등을 제거하고 표준체를 이용하여 입도별로 분류하는 입도분리하고, pH 5.8~6.3의 증류수를 삼각플라스크에 넣고 고액비(L/S)를 5로 하여 측정 대상인 바닥재와 섞어 교반시키는 수세처리단계; 인위적으로 CO2를 주입하여 난용성 염화물인 Friedel 염을 제거시키는 탄산화단계로 구성된다. In an aspect, the present invention is to heat the municipal waste incineration bottom ash having a water content of about 30-50% to a temperature of 100 ℃ to dry until the decrease in water content is less than 0.1% and using a magnetic separator, such as iron metal in the floor Removing water and separating the particle size classified by particle size using a standard body, and distilled water having a pH of 5.8 to 6.3 in a Erlenmeyer flask was added to the solid-liquid ratio (L / S) of 5 and mixed with a flooring material to be measured and stirred. It is composed of a carbonation step by artificially injecting CO 2 to remove Friedel salt, a poorly soluble chloride.
본 발명에서 탄산화 공정을 통한 소각 바닥재의 난용성 염화물의 제거는 아래와 같은 반응에 의해 일어나는 것으로 판단된다: In the present invention, the removal of the poorly soluble chloride of the incineration bottom ash through the carbonation process is believed to occur by the following reaction:
3CaO·Al2O·CaCl·10H2O+3CO3
2-→ 3CaCO3+Al2O3+CaCl2+10H2O (1) 3CaO · Al 2 O · CaCl · 10H 2 O + 3CO 3 2- → 3CaCO 3 + Al 2 O 3 + CaCl 2 + 10H 2 O (1)
본 발명에 따른 수세처리 과정을 통하여, 바닥 소각재에 포함된 전체 염화물 중 KCl과 NaCl의 형태로 약 80%를 차지하는 가용성 염을 효과적으로 제거할 수 있었으며 수세처리로 제거되지 않는 나머지 20%의 난용성 염(Friedel salt)의 경우, 탄산화 처리를 통해 최종 처리 가능함을 확인하였다. Through the washing process according to the present invention, it was possible to effectively remove about 80% of the soluble salts in the form of KCl and NaCl out of the total chloride contained in the bottom incineration ash, the remaining 20% of poorly soluble salt not removed by washing In the case of (Friedel salt), it was confirmed that the final treatment through the carbonation treatment.
실시예 EXAMPLE
수세처리와 탄산화 처리 공정을 통한 염화물의 제거Removal of chlorides through water and carbonation processes
함수율이 약 30-50%인 생활폐기물 소각 바닥재를 오븐기에 넣고 100℃의 온도로 가열하여 함수율의 감소량이 0.1% 미만이 될 때까지 건조(약 1일)하였다. 건조된 바닥재는 자력선별기를 이용하여 바닥재에 함유되어 있는 철 금속들을 제거하였다. The municipal waste incineration bottom ash having a water content of about 30-50% was placed in an oven and heated to a temperature of 100 ° C., and dried (about 1 day) until the decrease in water content was less than 0.1%. The dried flooring material was removed by using a magnetic separator to remove the ferrous metals contained in the flooring material.
철 금속이 제거된 바닥재에서 가용성 염화물을 제거하기 위하여, 수세처리(washing process)를 실시하였다. 수세처리방법은 pH 5.8-6.3의 증류수 200mL을 500mL의 삼각플라스크에 넣고 고액비(L/S)를 5로 하여 측정대상인 바닥재(40g)와 섞어 200rpm에서 20시간 동안 교반하였다. 교반이 끝난 시료와 침출액을 마이크로필터를 이용하여 서로 분리하였으며, 시료로부터 분리된 침출액에 대해 K, Na, Ca 그리고 Cl의 농도를 X 선 회절장치를 이용하여 측정하였다. In order to remove the soluble chlorides from the bottom ash with the iron metal removed, a washing process was performed. In the washing method, 200 mL of distilled water having a pH of 5.8-6.3 was placed in a 500 mL Erlenmeyer flask, and the solid solution ratio (L / S) was set at 5 and mixed with the bottom ash (40 g) to be measured for 20 hours at 200 rpm. After the stirring sample and the leaching solution were separated from each other using a micro filter, the concentration of K, Na, Ca and Cl for the leaching solution separated from the sample was measured using an X-ray diffractometer.
그 결과, 도 2에 나타난 바와 같이, 수세처리 약 30분 후 80.1%의 염화물이 제거되었고 30분 이후에는 제거율의 변화가 일어나지 않았다. As a result, as shown in Fig. 2, 80.1% of chloride was removed after about 30 minutes of washing with water, and no change of removal rate occurred after 30 minutes.
도 3은 0.15mm 입도를 가진 바닥재의 수세 처리 전과 후의 XRD 분석결과를 나타낸 것으로, 수세처리 전의 바닥재에서는 가용성 화합물인 KCl, NaCl과 난용성 염화물인 Friedel 염(3CaO·Al2O·CaCl·10H2O)의 피크가 나타났다. 반면 수세처리 된 바닥재의 XRD에서는 KCl과 NaCl의 피크는 나타나지 않았지만 Friedel 염의 피크는 남아있었다. Figure 3 shows the results of XRD analysis before and after washing the flooring material having a particle size of 0.15mm, the soluble compounds KCl, NaCl and Friedel salts of poorly soluble chloride (3CaOAl 2 O.CaCl.10H 2) O) peak appeared. On the other hand, the XRD of the washed flooring showed no peaks of KCl and NaCl but remained of Friedel salts.
상기 결과에 의하여 수세처리를 실시하면 가용성 염은 제거되지만, 난용성 염은 제거되지 않음을 확인하였으며, 가용성 염은 대부분 KCl과 NaCl의 형태이고, 난용성 염은 Friedel 염의 형태로 존재한다는 것을 알 수 있었다. Based on the above results, it was confirmed that the soluble salts were removed but the poorly soluble salts were not removed. The soluble salts were mostly in the form of KCl and NaCl, and the poorly soluble salts were in the form of Friedel salt. there was.
또한, 소각바닥재 안에 함유되어 있는 Cl 화합물의 약 80%가 가용성 염화물이며, 약 20%는 난용성 염화물임을 예측할 수 있었다. In addition, about 80% of the Cl compounds contained in the incineration bottom ash were soluble chlorides, and about 20% were poorly soluble chlorides.
가용성 염이 제거된 바닥재에서, 난용성 염화물을 제거하기 위하여, 물과 소각 바닥재의 고액비(L/S)를 10으로 하여, CO2를 30분간 인위적으로 불어 넣어 주어 탄산화를 실시한 후 X선 회절장치를 이용하여 염화물의 농도를 측정하였다. In order to remove poorly soluble chlorides, the soluble salts are removed, and the liquid-liquid ratio (L / S) of water and incinerated bottoms is set to 10, and CO 2 is artificially blown for 30 minutes to perform carbonation, followed by X-ray diffraction. The concentration of chloride was measured using the device.
그 결과, 도 4에 나타난 바와 같이, 생활폐기물 소각 바닥재에 존재하는 난용성 염(Friedel salt)은 탄산화에 의해 분해 가능함을 확인 하였고 이러한 결과는 아래와 같은 반응에 의해 일어나는 것으로 판단된다. As a result, as shown in Figure 4, it was confirmed that the poorly soluble salt (Friedel salt) present in the municipal waste incineration bottom ash can be decomposed by carbonation, and these results are determined to occur by the following reaction.
3CaO·Al2O·CaCl·10H2O+3CO3
2- → 3CaCO3+Al2O3+CaCl2+10H2O (1) 3CaO · Al 2 O · CaCl · 10H 2 O + 3CO 3 2- → 3CaCO 3 + Al 2 O 3 + CaCl 2 + 10H 2 O (1)
본 발명에 따르면, 생활 폐기물 소각 바닥재의 염화물을 효과적으로 제거할 수 있어, 생활 폐기물 소각 바닥재를 매립 또는 도로포장재 등으로 재활용 할 경우 바닥재 내에 포함된 다량의 염화물로 인해 발생하였던 문제점을 해소할 수 있다. According to the present invention, it is possible to effectively remove the chloride of the municipal waste incineration flooring, it is possible to solve the problems caused by the large amount of chloride contained in the flooring when recycling the municipal waste incineration flooring to landfill or road paving.
Claims (5)
- 다음 단계를 포함하는 생활폐기물 소각 바닥재의 염화물을 제거하는 방법: How to remove chloride from municipal waste incineration bottoms, which includes the following steps:(a) 생활폐기물의 소각바닥재를 pH 5~7의 증류수와 섞어 교반시켜 가용성 염화물을 제거하는 수세처리단계; 및 (a) a water washing step of removing the soluble chloride by stirring the incineration bottom ash of domestic waste with distilled water of pH 5-7; And(b) 수세처리된 바닥재에 CO2 가스를 주입하여 난용성 염화물을 탄산화시키는 단계. (b) injecting CO 2 gas into the washed bottom ash to carbonize the poorly soluble chloride.
- 제1항에 있어서, (a) 단계에서 교반시키는 생활폐기물의 소각바닥재의 고액비율(액체/고체)은 2~10인 것을 특징으로 하는 방법. The method according to claim 1, wherein the solid-liquid ratio (liquid / solid) of the incineration bottom ash of domestic waste stirred in step (a) is 2 to 10.
- 제1항에 있어서, (b) 단계의 수세처리된 바닥재의 고액비율(액체/고체)은 5~10인 것을 특징으로 하는 방법. The method of claim 1, wherein the solid-liquid ratio (liquid / solid) of the washed flooring of step (b) is 5 to 10.
- 제1항에 있어서, (a) 단계의 생활폐기물 소각 바닥재는 가열할 때, 함수율 감소량이 0.1% 미만이 될 때까지 건조된 것임을 특징으로 하는 방법. The method of claim 1, wherein the municipal waste incineration bottom ash of step (a) is dried until the moisture content decreases below 0.1% when heated.
- 제1항에 있어서, (a) 단계의 생활폐기물 소각 바닥재는 금속이 제거된 것임을 특징으로 하는 방법. The method of claim 1, wherein the waste incineration bottom ash of step (a) is characterized in that the metal is removed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014178451A1 (en) * | 2013-04-30 | 2014-11-06 | 한국지질자원연구원 | Method for stabilising heavy metal components by means of capsulation effect using accelerated carbonation reaction of biowaste incineration bottom ash |
| CN110918611A (en) * | 2019-12-10 | 2020-03-27 | 中南大学 | Treatment method for stabilizing/curing arsenic sulfide slag based on Friedel salt |
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| JP2005279370A (en) * | 2004-03-29 | 2005-10-13 | Ebara Corp | Method and apparatus for washing incinerated ash and cement kiln dust with water |
| JP2005288328A (en) * | 2004-03-31 | 2005-10-20 | Asahi Kasei Engineering Kk | Treatment method and apparatus for washing incinerator ash |
| JP2008055395A (en) * | 2006-09-04 | 2008-03-13 | Fujita Corp | Method of treating burned ash |
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| JPH07155737A (en) * | 1993-10-27 | 1995-06-20 | Techno Frontier:Kk | Method for reutilizing burned ash from bottom of stoker-type waste incinerator |
| JP2005279370A (en) * | 2004-03-29 | 2005-10-13 | Ebara Corp | Method and apparatus for washing incinerated ash and cement kiln dust with water |
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| WO2014178451A1 (en) * | 2013-04-30 | 2014-11-06 | 한국지질자원연구원 | Method for stabilising heavy metal components by means of capsulation effect using accelerated carbonation reaction of biowaste incineration bottom ash |
| CN110918611A (en) * | 2019-12-10 | 2020-03-27 | 中南大学 | Treatment method for stabilizing/curing arsenic sulfide slag based on Friedel salt |
| CN110918611B (en) * | 2019-12-10 | 2022-08-05 | 中南大学 | Treatment method for stabilizing/curing arsenic sulfide slag based on Friedel salt |
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